Honda Civic. Manual — part 917

Fig. 57: Diagnostic Menu Screen Display - Hard Key
Courtesy of AMERICAN HONDA MOTOR CO., INC.

CAR STATUS

Use this screen to confirm that navigation unit is properly receiving input signals.
Signals equal to (0) are OFF, and signals equal to (1) are ON. If the value on the
display does not match the actual vehicle status, then check the wire carrying the
signal.

Fig. 58: Diagnostic Menu Screen Display - Car Status
Courtesy of AMERICAN HONDA MOTOR CO., INC.

VSP-Vehicle Speed Pulse from ECM/PCM connector A (Navigation unit
connector A (17P) terminal No. 13)

a. OFF (0) when vehicle is not moving

b. ON (1) when vehicle is moving

The VSP comes from the ECM/PCM as a dedicated signal. Internally, the
navigation unit compares the actual VP on the map against street data to adjust the
pulse to speed scaling factor.

BACK-Reverse indication from taillight relay (Navigation unit connector C
(12P) terminal No. 7)

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Navigation System - Civic (Except Hybrid)

a. OFF (0) when shift lever is in any position other than reverse

b. ON (1) when shift lever is in reverse

The Back signal is used by the navigation unit to allow the map screen to show the
VP moving backwards when in reverse and to trigger the optional rear view camera.
This signal is needed because the Speed Pulse does not provide any directional
information to the system.

ILL CANCEL

a. OFF (0) when the dash lights brightness control button is less than 90 %

brightness with the headlights turned on.

b. ON (1) when the dash lights brightness control button is more than 90 %

brightness with the headlights turned on.

ILL-Illumination Indication (Navigation unit connector A (17P) terminal No.
10)

a. OFF (0) when parking lights, or headlights are off

b. ON (1) when parking lights, or headlights are on

The navigation unit uses the signal to determine whether to put the navigation
screen into the Day or Night brightness mode. (Setup screen 1)

Display-this displays the current position of the display

a. (Close) when the display is closed

b. (Open) when the display is open

The navigation unit has a microswitch to detect this. If open is indicated when the
display is closed, replace the navigation unit.

GPS INFORMATION

This screen shows the current status of GPS reception. The circular diagram shows
the current location of the GPS satellites (yellow balls) as they would appear in the
sky. The outer circle represents the horizon (0 degrees elevation). The middle and
inner circles represents 30 and 60 degrees respectively. The very center of the
diagram (90 degrees elevation) is directly overhead. Nearby obstructions, like tall

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Navigation System - Civic (Except Hybrid)

buildings, will block satellites in that direction. That is why it is necessary to be in
an open area to effectively troubleshoot GPS reception issues. The satellites shown
on the diagram correspond to the PRN number in the GPS Details screen. There are
always 24 active GPS satellites in orbit. Because satellites fail, and have to be
removed from service, spares are always parked in orbit, ready to be activated. This
is why the PRN (satellite ID number) can be greater than 24.

Fig. 59: Diagnostic Menu Screen Display - GPS Information

NOTE:

To use this screen for troubleshooting, the vehicle
should be outside, away from buildings, tall trees, and
high-tension wires for at least 10 minutes with the
engine running.

Metallic window tinting on the front or side window or
after-market electronic accessories mounted near the
navigation unit, GPS antenna, or navigation display can
interfere with GPS acquisition.

The Number of Satellites box shows the number of
acquired satellites (maximum of 12). It should contain 4
or more icons. If not, troubleshoot for GPS icon is white
or not shown (see GPS ICON IS WHITE OR NOT
SHOWN).

The Current Position shows latitude, longitude, and
elevation (in meters). If there are less than 4 satellites,
the elevation can be grossly inaccurate.

The Date/Time field shows the current date, and also a
time that includes daylight savings and other offsets
entered by the customer in Setup function Adjust Time
Zone/Clock.

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Navigation System - Civic (Except Hybrid)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

GPS DETAIL

By pressing and holding the MENU button for 10 seconds, a GPS Detail screen
appears. This screen displays real time incoming satellite positional data. Most of
the information shown on this screen is for factory use, however some of the data
can indicate partial GPS signal interference.

Fig. 60: Diagnostic Menu Screen Display - GPS Detail
Courtesy of AMERICAN HONDA MOTOR CO., INC.

The box TS/AS and HDop/VDop is for factory use.

The Speed and Direction information is updated in real time when driving, and
can be used to detect intermittent speed sensor problems.

The Date/Time Information is the same as in Setup screen 2 Adjust Time
Zone/Clock.

If the 3D icon is shown above the yellow dots, this implies that at least 4
satellites are available for map positioning, and the GPS indicator on the map
screen will be green. See the GLOBAL POSITIONING SYSTEM detailed
explanation in the System Description .

If the row of data in the table below begins with a yellow dot, the AZI and EL
fields can be used to locate each satellite PRN # on the circular GPS diagram
(see prior screen).

NOTE:

Push and hold the Map/Guide button, and the dots on the
diagram are replaced with the PRN # (satellite numbers).
These numbers correspond to the numbers in the PRN
column on the GPS details screen.

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Navigation System - Civic (Except Hybrid)